21665865

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{811}}^1$

素因数の和:969

約数の個数: 32

約数和(自身を含む): 37650816

約数和(自身を除く): 15984951

約数列:

[1, 3, 5, 13, 15, 39, 65, 137, 195, 411, 685, 811, 1781, 2055, 2433, 4055, 5343, 8905, 10543, 12165, 26715, 31629, 52715, 111107, 158145, 333321, 555535, 1444391, 1666605, 4333173, 7221955, 21665865]

約数ペア:

[(1, 21665865), (3, 7221955), (5, 4333173), (13, 1666605), (15, 1444391), (39, 555535), (65, 333321), (137, 158145), (195, 111107), (411, 52715), (685, 31629), (811, 26715), (1781, 12165), (2055, 10543), (2433, 8905), (4055, 5343)]